not just gravity but other non-contact forces like magnetism. how is it that the force is transmitted without a medium and without any dissipation? all creative answers are welcome.
2007-02-25 23:39:20 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Think about a cloth having grids of lines printed across it. and u put a ball on it. the centre of the cloth will be depressed by the weight of the ball and the grid lines will appear to be curved. The heavier the ball, steeper will be the curvature of grid lines. This curvature is nothing but gravity of that ball with respect to the cloth. So, earth also curves the space and time around it. By virtue of its "mass", the space-time continum is curved around it. The curvature of this curve is called gravity. If u put a lighter ball on the cloth, u'll find it is moving towards the heavier ball at the centre. Higher the mass of the center ball steeper 'll be the curve and the lighter ball will move faster towards it. If u move away from the centre then the curves will be flat so gravity is not felt in space. S it does not need contact. Gravity is a property by vertue of its mass.
Similarly a magnet which nothig but a dipole, repels the like pole from an ordinary iron, making it a magnet temporarily whose opposite pole is facing it. Hence the two unlike poles come close and experience force of attraction.
2007-02-27 02:15:37 · answer #1 · answered by Anonymous · 0⤊ 0⤋
There is a short writing at http://360.yahoo.com/noddarc entitled "Magnetism and Gravity" that will describe what you seek.
Basically, the force of gravity is that of a particular kind of energy. It is found in the physics trilogy, which is, E = mc2, m = E/c2, and c2 = E/m. The last is that of a gravitational field. It shows that this force is a product that exists between mass and a particular kind of energy. If either of these values change, then their product also changes.
At the same location as that above there is also a writing entitled "The Problem and Repair of Relativity" that describes why a gravitational field exists.
2007-02-26 14:17:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
No 1
oh my God I don't know how to answer this
But I know that gravity is a force created by the earth's magnetic core which is holding us down on earth and help to create the atmosphere where man can survive in, luckily there is lots of water involve unlike other planets
the magnetic Field revolves between the south and North pole that result in creating Gravity and the heavier the planet (mostly the bigger) the more gravity it will posses
The bigger planet's gravity (e.g Earth) can also force other planet to revolve(orbit) around it like how the Moon revolve around the Earth
2007-02-26 07:59:55 · answer #3 · answered by spartan2987 1 · 0⤊ 1⤋
Gravity IS a contractive force. Attraction to a common center and is a field effect so it is using a field or meduim to act in.
The "Bending of space-time" (as you have probably heard of that) is an example of it's effects in its' Medium of propagation
Magnetism uses a medium, simply place a sheet of paper over a magnet and toss on some iron filings and you will see a limited field floating in its' 'medium' around the magnet.
2007-02-26 09:02:34 · answer #4 · answered by occluderx 4 · 0⤊ 0⤋
According to Einstein, the last expert on the subject, gravity works by bending spacetime so that straight line bend towards massive elements.
A good illustration of this concept for a 2 dimension space: imagine an infinite sheet of rubber: this is space. Now put some marbles on it, these are planets/stars: they would make an indentation on the sheet of rubber, bending it in just the same way as gravity. Now extend this image to three dimensions... and you understand gravity.
2007-02-26 09:01:50 · answer #5 · answered by catarthur 6 · 0⤊ 0⤋
This is a complex and not totally resolved question in terms of the classical view of attraction and repulsion. What is known is that the interaction is brought about by an exchange of particles (in the case of gravitation this particle is called the graviton). Other particles serve as the exchange particle for other types of force.
2007-02-26 07:46:56 · answer #6 · answered by physicist 4 · 0⤊ 0⤋
Ah, we're allowed to be creative.
Can't help think of a poster I saw many years ago:
"Gravity does not exist. The Earth sucks!"
2007-02-26 07:44:59 · answer #7 · answered by sevenletters4me 6 · 0⤊ 0⤋
According 2 the universal law of gravitation, every body in the universe attracts every other body in the universe. If u want 2 know y its as hard as explaining y there r humans (i think)!
2007-02-26 07:51:28 · answer #8 · answered by Dark Prince 2 · 1⤊ 0⤋
All bodies that displace space have gravity, including you and I.
The larger the body, the greater the gravitational effect!
2007-02-26 07:43:32 · answer #9 · answered by tattie_herbert 6 · 0⤊ 0⤋
gravity, is the force pullin you towards the centre of the earth, its cuz of the simultaneous centrifugal and centripetal force actin on ya cuz of the earth's rotation...
technically, gravity is actually the relative force between any two bodies in the universe..
2007-02-26 07:49:22 · answer #10 · answered by Anonymous · 0⤊ 1⤋